This week's episode of Cheddar Rides focuses on the issue of safety in the transportation industry. Starting with breaking news, the United States is grounding Boeing 737 MAX 8 and 9 planes. The MAX 8 model has been involved in two fatal crashes in less than six months. Richard Aboulafia, vice president of analysis at Teal Group, discusses the Boeing backlash. Plus, Emiko Atherton, director of the National Complete Streets Coalition at Smart Growth America, weighs in on how to keep pedestrians safe after a startling number of deaths. And Alex Horwitz, director of "Autonomy," and Chris Urmson, subject of the film, preview the new documentary about automated vehicles from SXSW.